Gift Xbox credit?

As Valentine's Day is approaching, I wanted to give my friend an Xbox gift card. He likes to play Call of Duty and often, but I know nothing about it, is there anything in cod that can only be bought with credit?

Or can he redeem the prepaid card in cod or is that just to buy new games?

And would you men be happy about it?

Credit can also be converted into game currency. In cod, for example, it would be "credits" if I'm not mistaken. So you can buy things in the game that you would not get for free. We men / boys would be very happy we would get something. Good gift idea.

Small addition: They are called CoD points. But he's right. You can buy these points with the credit and use them to buy things in the game.